Various exemplary embodiments relate to a method and related network node including one or more of the following: receiving a Diameter message at the DRA from an origin device, wherein the Diameter message is associated with a subscriber; establishing a subscriber record context object in response to receiving the Diameter message, wherein the subscriber record context object is associated with a subscriber record of the subscriber; evaluating a rule that includes a context object reference, wherein the evaluation includes accessing the subscriber record context object based on the context object reference; and transmitting a message based on the evaluation of the rule.